Debt instrument accrued interest forgiven.

No definition available.

Name:	DENR_DebtInstrumentAccruedInterestForgiven
Namespace Prefix:	DENR_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument face amount forgiven.

+ References

No definition available.

+ Details

Name:	DENR_DebtInstrumentFaceAmountForgiven
Namespace Prefix:	DENR_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Gain loss on loan forgiveness.

+ References

No definition available.

+ Details

Name:	DENR_GainLossOnLoanForgiveness
Namespace Prefix:	DENR_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Increase for accrued, but unpaid interest on the debt instrument for the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received from principal payments made on loans related to operating activities.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_TypeOfArrangementAxis=DENR_PaycheckProtectionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Notes Payable (Details Narrative) - USD ($)			12 Months Ended
Notes Payable (Details Narrative) - USD ($)	Mar. 03, 2021	Apr. 27, 2020	Feb. 28, 2022	Feb. 28, 2021	Jul. 28, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Gain on loan forgiveness			$ 101,723
Loan principal amount			6,925,000	6,850,000
Interest paid			1,692
Paycheck Protection Program [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Proceeds from loans	$ 120,000	$ 118,750
Interest rate	1.00%	1.00%
Maturity date	Mar. 03, 2026	Apr. 27, 2022
Accrued interest			1,190	1,002
Loan principal amount forgiven					$ 100,448
Loan accrued interest forgiven					$ 1,275
Gain on loan forgiveness			101,723
Loan principal amount			4,131
Payment per month			2,068
Interest paid			$ 1,700	$ 0